A light emitting device package includes a package body, first and second lead frames located on the package body, a light source mounted on at least one of the first or second lead frames, a lens located on the package body, and a wavelength conversion unit partially located on the package body between the package body and the lens.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A light emitting device package comprising: a package body; first and second lead frames located on the package body; a light source mounted on at least one of the first or second lead frames; a lens located on the package body; and a wavelength conversion unit partially located on the package body between the package body and the lens, wherein the wavelength conversion unit comprises: a first segment located at an upper surface of the light source; and a second segment extending from the first segment and located at a side surface of the light source, and wherein the lens comprises: a lower recess for receiving at least a portion of the first and second segments; and an upper recess for reflecting and refracting light emitted from the light source and transmitted through the wavelength conversion unit.
2. The light emitting device package according to claim 1 , wherein the wavelength conversion unit further comprises a third segment extending from the second segment and located between the package body and the lens.
3. The light emitting device package according to claim 2 , wherein the package body comprises a cavity, in which the light source is mounted, and the third segment is located on at least a portion of a bottom surface of the cavity excluding a side surface of the cavity.
4. The light emitting device package according to claim 3 , wherein a ratio of an area in which the wavelength conversion unit is actually located to a total area in which the wavelength conversion unit can be located is equal to or greater than 0.1 and less than 1.
5. The light emitting device package according to claim 3 , wherein a ratio of a color distribution variation of an area in which the wavelength conversion unit is located to a color distribution variation of a total area in which the wavelength conversion unit can be located is 0.001 to 0.8.
6. The light emitting device package according to claim 5 , wherein the color distribution variation comprises a result obtained by subtracting a minimum value from a maximum value of correlated color temperature.
7. The light emitting device package according to claim 5 , wherein the color distribution variation comprises a result obtained by subtracting a minimum value from a maximum value of color coordinates.
8. The light emitting device package according to claim 2 , wherein the first to third segments have the same thickness.
9. The light emitting device package according to claim 2 , wherein the first to third segments have different thicknesses.
10. The light emitting device package according to claim 1 , wherein the wavelength conversion unit has at least one selected from among a circular planar shape, an oval planar shape, and a polygonal planar shape.
11. The light emitting device package according to claim 1 , wherein the light source has an asymmetrical planar shape in a direction intersecting an optical axis.
12. The light emitting device package according to claim 11 , wherein a minor-axis length of the wavelength conversion unit located in a minor-axis direction of the light source is greater than a major-axis length of the wavelength conversion unit located in a major-axis direction of the light source.
13. The light emitting device package according to claim 1 , wherein the wavelength conversion unit has a planar shape symmetric with respect to an optical axis.
14. The light emitting device package according to claim 1 , wherein the wavelength conversion unit is located so as to surround the light source.
15. The light emitting device package according to claim 1 , wherein the wavelength conversion unit has a planar shape asymmetric with respect to an optical axis.
16. The light emitting device package according to claim 1 , wherein the wavelength conversion unit comprises silicon.
17. A lighting apparatus comprising: a light emitting device package according to claim 1 ; and an optical member located on the light emitting device package.
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November 10, 2015
May 9, 2017
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